The F$1$ value obtained from the following array will be written to ports every $1\mathrm{.}5$ seconds, the $F2$ value every $2$ seconds, and the $F$ value every $2\mathrm{.}5$ seconds using PIC $16$F$877$A$.$

$F=F1+F2+F3....$ Fn $(n=$ array length $=4)$

$F1=$ Sum of numbers excluding those in column $A1$ and row $B1$

$F2=$ Sum of numbers excluding those in column $A2$ and row $B2$

C Language

MicroC program